322 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



depth of bill at base, 5.38; tarsus, 17.02-17.53 (17.27): middle toe, 

 11. -13-11. 94 (11.68).' 



Southern New Mexico (Silver City), southward over eastern border 

 of Mexican plateau to southern Puel)la (Chalchiconuda); breeding 

 from Tamaulipas (Miquihuana) northward. 



Spizdla wortheni Ridgway, Proe. U. S. Nat. Miis., vii, no. 17, Aug. 22, 1884, 2.59 

 (Silver City, New Mexico, June 16; U. S. Nat. ]Mus. ). — American Orni- 

 thologists' Union, Clieck List, 1886, no. .564. — Sharpe, Cat. Birds Brit. Mus., 

 xii, 1888, 666 ("western Texas"). 



8.{j)izelki\ ivortlicnl Ridgway, Man. N. Am. Birds, 1887, 419. 



(??) Sp'izeUa puallla (not FrhnpUa prisilla Wilson?) Sharpe, Cat. Birds Brit. Mus., 

 xii, 1888, 664, part ("Mexico"). 



SPIZELLA ATROGULARIS (Cabanis). 

 BLACK-CHINNED SPARROW. 



Admit niale.—Lioreii, anterior portion of malar region, chin, and 

 more or less of the throat. ])lack: rest of head and neck gray, darker 

 (slate-gray or slate-color) on pileum, where sometimes narrowly and 

 indistinctly streaked with dusky, fading into lighter gray (no. 7) or 

 olive -gray on chest and other under parts, the abdomen white; back 

 light rusty brown or cinnamon (sometimes mixed with broccoli brown) 

 streaked with black; scapulars similar but with outer webs more 

 decidedly rusty or cinnamomeous; rump and upper tail-coverts plain 

 gray or olive-gray, the latter sometimes with darker mesial streaks; 

 tail dusky, the rectrices edged with light gra}", lesser wing-coverts 

 gray; middle coverts dusky centrally, liroadly margined, and tipped 

 with pale cinnamon-buHy; greater coverts dusky centrally broadly 

 edged with pale buffy brown or wood brown; tertials dusky, edged 

 with pale wood brown; primaries dusky edged with pale grayish; bill 

 vina(;eous-cinnamon, more or less darker at tip; tarsi deep brown or 

 dusky, the toes usually darker; length (skins), 121.92-140.21 (134.62); 

 wing. 60.20-69.85 (64.01): tail. 61.21-74.17 (67.82); exposed cidmen, 

 8.64-10.16 (9.40); depth of bill at base (three specimens), 5.84-6.10 

 (5.97); tarsus, 17.53-20.32 (18.80); middle' toe, 12.19-13.97 (13.21).' 



Adult female. — Similar to the adult male and not always distin- 

 guishable, but usually with the black of chin, etc., duller and much less 

 extended (hardly extending to upper throat), often entirely wanting, 

 the entire head being gray,^ and the gray of pileum and hindneck 

 rather browner; length (skins), 124.46-138.68 (131.32); wing, 60.20- 

 64.77 (61.47); tail, 59.94-69.85 (65.28); exposed culmen. 8.64-9.91 



^ Two specimens. 



^ Fifteen specimens. 



^ Usually the black is indicated by a darker shade of the gray. 



I 



